... .Frequency:dual band900/1800MHz 3.Interface:DB 9 pin mc39i modem ,SMS/MMS/GPRS function ,advanced performance Specification : Cinterion GSM ... : non transparent, CSD up to 14.4kbps, USSD, Interfaces: UART, RF connector, 40 pin system connector, SIM card interface, Keypad and ... for connector SIM card holder U.FL to SMA RF cable MC39I modem simplfied info: Module cinterion MC39i FrequencyGSM 900/1800MHz ...